“Happy 4th birthday, Gideon and Harper. I can’t believer that you used to be tiny baby things. And now, this.” the 41-year-old Gone Girl actor wrote on his Twitter account, along with the photo.
“Today is an exciting day!! Our twins turn 4! I can not believe how old they are! #solucky #happybirthday!” David wrote on his Twitter.
Happy birthday, Gideon and Harper – they look like they are all grown-up!